检查密码是否满足长度条件

Question

所以在我将这个新的if 语句添加到我的代码中检查字符串长度之前，它工作得非常好。我现在尝试添加一个额外的if 语句，以查看表单上的密码长度是否满足 6 到 32 个字符长的条件，但由于某种原因，我仍然收到错误消息（500 服务器错误）。

我试图一遍又一遍地阅读代码，但似乎无法发现是什么导致了我这个错误。我不确定是否是我放置此语句的位置可能导致此问题或比此更小和更简单的问题。

希望能对此提出一些建议。提前谢谢你。

<?php

ini_set('display_errors', 'On');
ini_set('html_errors', 0);
error_reporting(-1);

require 'connection.php';

$message = '';

$username = $_POST['username'];
$password = $_POST['password'];
$confirmpassword = $_POST['confirmpassword'];

if (!empty($_POST['username']) && !empty($_POST['password'])):
  //var_dump($password, $confirmpassword);
  if(strlen($password) < 6 || strlen($password) > 32):

    if($password == $confirmpassword):


    $sql = "INSERT INTO users (FirstName, LastName, Role, Email, Username, Password) VALUES (:firstname, :lastname, :role, :email, :username, :password)";
    $stmt = $conn->prepare($sql);
    $hashPassword = password_hash($password, PASSWORD_DEFAULT);

    $stmt->bindParam(':firstname', $_POST['firstname']);
    $stmt->bindParam(':lastname', $_POST['lastname']);
    $stmt->bindParam(':role', $_POST['role']);
    $stmt->bindParam(':email', $_POST['email']);
    $stmt->bindParam(':username', $_POST['username']);
    $stmt->bindParam(':password', $hashPassword);

    if ($stmt->execute()):
      echo 'Well done! You have successfully registered with us!';
      header('Location:loginPage.php');
    else:
      echo 'There seems to be an issue getting you registered.';
      //$message = 'There seems to be an issue getting you registered.';
    endif;
  else:
    echo 'Your password must be between 6 to 32 characters.';
  else:
    echo 'Your passwords do not match, please enter them correctly.';
    header('Location:registerPage.php');
  endif;
endif;
endif;

Answer 1

快速浏览可能的错误原因：

• 第 28 行有一个 else 语句，然后是第 30 行的另一个 else。
• 第 32 行在回显后调用了 header(Location:)，这将不起作用，因为 header() 在其之前无法输出/打印任何内容。

此外，通常内部错误 (500) 是由 Apache 的错误配置而不是代码错误引起的。您是否尝试过删除多余的 if() 语句并查看您的代码是否有效？

使用代码编辑：

ini_set('display_errors', 'On');
ini_set('html_errors', 0);
error_reporting(-1);

require 'connection.php';

$message = '';

$username = $_POST['username'];
$password = $_POST['password'];
$confirmpassword = $_POST['confirmpassword'];

if (!empty($_POST['username']) && !empty($_POST['password'])):
  //var_dump($password, $confirmpassword);
  if(strlen($password) < 6 || strlen($password) > 32):

    if($password == $confirmpassword):
      $sql = "INSERT INTO users (FirstName, LastName, Role, Email, Username, Password) VALUES (:firstname, :lastname, :role, :email, :username, :password)";
      $stmt = $conn->prepare($sql);
      $hashPassword = password_hash($password, PASSWORD_DEFAULT);

      $stmt->bindParam(':firstname', $_POST['firstname']);
      $stmt->bindParam(':lastname', $_POST['lastname']);
      $stmt->bindParam(':role', $_POST['role']);
      $stmt->bindParam(':email', $_POST['email']);
      $stmt->bindParam(':username', $_POST['username']);
      $stmt->bindParam(':password', $hashPassword);

      if ($stmt->execute()):
        echo 'Well done! You have successfully registered with us!';
        header('Location:loginPage.php');
      else:
        echo 'There seems to be an issue getting you registered.';
        //$message = 'There seems to be an issue getting you registered.';
      endif;
    else:
      echo 'Your password must be between 6 to 32 characters.';
    endif;

  // ========= You need to add `endif` (above) before starting another `else`
  else:
    echo 'Your passwords do not match, please enter them correctly.';
  endif;

  header('Location:registerPage.php');
endif;

编辑 2，相同的代码，但有额外的可视块行（警告：会产生语法错误）：

ini_set('display_errors', 'On');
ini_set('html_errors', 0);
error_reporting(-1);

require 'connection.php';

$message = '';

$username = $_POST['username'];
$password = $_POST['password'];
$confirmpassword = $_POST['confirmpassword'];

if (!empty($_POST['username']) && !empty($_POST['password'])):
  //var_dump($password, $confirmpassword);
  if(strlen($password) < 6 || strlen($password) > 32):
  | 
  |  if($password == $confirmpassword):
  |  |  $sql = "INSERT INTO users (FirstName, LastName, Role, Email, Username, Password) VALUES (:firstname, :lastname, :role, :email, :username, :password)";
  |  |  $stmt = $conn->prepare($sql);
  |  |  $hashPassword = password_hash($password, PASSWORD_DEFAULT);

  |  |  $stmt->bindParam(':firstname', $_POST['firstname']);
  |  |  $stmt->bindParam(':lastname', $_POST['lastname']);
  |  |  $stmt->bindParam(':role', $_POST['role']);
  |  |  $stmt->bindParam(':email', $_POST['email']);
  |  |  $stmt->bindParam(':username', $_POST['username']);
  |  |  $stmt->bindParam(':password', $hashPassword);

  |  |  if ($stmt->execute()):
  |  |    echo 'Well done! You have successfully registered with us!';
  |  |    header('Location:loginPage.php');
  |  |  else:
  |  |    echo 'There seems to be an issue getting you registered.';
  |  |    //$message = 'There seems to be an issue getting you registered.';
  |  |  endif;
  |  else:
  |    echo 'Your password must be between 6 to 32 characters.';
  |  endif;
  |
  // ========= You need to add `endif` (above) before starting another `else`
  else:
    echo 'Your passwords do not match, please enter them correctly.';
  endif;

  header('Location:registerPage.php');
endif;